[Motorola BECKHAM] Flash slot_a to slot_b

flash.sh

#!/bin/sh
# This script has one simple target: copy slot_a to slot_b.
# Or in other words: Copy the working slot (in my case slot_a) to the defunct slot (slot_b)
# Use this in TWRP
# I dont expect this to work on ANY other phone!
# dd is commented out down there, as i dont want people to accidentally flash their phones to bricks. Uncomment to flash.

# Go to the named partitions dir in /dev/
cd /dev/block/platform/c0c4000.sdhci/by-name

# Loop for every file in there.
for file_a in *_a; do
    # Enter an empty line so you can look at it without getting autism
    echo -e "\n "
    # Strip the last character from $file_a
    file_b=${file_a%?}
    # Add "b" as the last character
    file_b="${file_b}b"
    # Calculate the checksums, this could take a while.
    chksum_a=$(md5sum "$file_a" | cut -c -32)
    chksum_b=$(md5sum "$file_b" | cut -c -32)
    # Compare the checksums
    if [ "$chksum_a" == "$chksum_b" ]; then
        # If the checksum matches, dont do anything more.
        echo "[[SUCCESS]] $file_b matches $file_a"
    else
        # If the checksums dont match, print an error
        echo "[ERROR] $file_b ($chksum_b) doesnt match $file_a ($chksum_a)"
	    # dd $file_a to $file_b, COMMENTED!
        ## dd if="$file_a" of="$file_b"
        # reset the checksum variables
	    chksum_a=""
	    chksum_b=""
        # Calculate the checksums again after the flash
	    chksum_a=$(md5sum "$file_a" | cut -c -32)
	    chksum_b=$(md5sum "$file_b" | cut -c -32)
        # Compare them _again_
	    if [ "$chksum_a" == "$chksum_b" ]; then
            # Both slots match now, yippie
	        echo "[[AFTER FLASH ]][[SUCCESS]] $file_b matches NOW $file_a"
 	    else
            # Both slots stil dont match, very bad.
            echo "[[AFTER FLASH ]][[ERROR]] $file_b STILL doesnt match $file_a :("
    fi
done